package com.ruoyi.rpt.service.impl;

import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ruoyi.common.core.web.domain.AjaxResult;
import com.ruoyi.common.core.exception.ServiceException;
import com.ruoyi.rpt.domain.RptDefinition;
import com.ruoyi.rpt.domain.RptDesign;
import com.ruoyi.rpt.mapper.RptDefinitionMapper;
import com.ruoyi.rpt.mapper.RptDesignMapper;
import com.ruoyi.rpt.service.IRptViewerService;
import com.ruoyi.rpt.utils.SqlExecutor;

/**
 * 报表查看Service实现
 */
@Service
public class RptViewerServiceImpl implements IRptViewerService {

    @Autowired
    private RptDefinitionMapper definitionMapper;

    @Autowired
    private RptDesignMapper designMapper;

    @Autowired
    private SqlExecutor sqlExecutor;

    /**
     * 执行报表查询
     */
    @Override
    public AjaxResult executeReport(Long reportId, Map<String, Object> params) {
        // 获取报表定义
        RptDefinition definition = definitionMapper.selectRptDefinitionByReportId(reportId);
        if (definition == null) {
            throw new ServiceException("报表不存在");
        }

        // 获取最新报表设计
        RptDesign design = designMapper.selectRptDesignByReportId(reportId);
        if (design == null) {
            throw new ServiceException("报表设计不存在");
        }

        try {
            // 创建一个基本的响应
            Map<String, Object> result = new HashMap<>();
            result.put("reportName", definition.getReportName());
            result.put("reportId", reportId);

            // 在实际实现中，这里应该解析设计并执行SQL
            // 这里返回一个测试数据
            result.put("data", new HashMap<String, Object>());
            
            return AjaxResult.success("查询成功", result);
        } catch (Exception e) {
            throw new ServiceException("执行报表失败: " + e.getMessage());
        }
    }

    /**
     * 导出报表数据
     */
    @Override
    public void exportReportData(HttpServletResponse response, Long reportId, Map<String, Object> params) {
        try {
        // 获取报表定义
            RptDefinition definition = definitionMapper.selectRptDefinitionByReportId(reportId);
            if (definition == null) {
                throw new ServiceException("报表不存在");
    }

            // 获取最新报表设计
            RptDesign design = designMapper.selectRptDesignByReportId(reportId);
            if (design == null) {
                throw new ServiceException("报表设计不存在");
    }

            // 在实际实现中，这里应该生成导出文件并写入响应
            // 这里返回一个简单的文本响应表示还未实现
            response.setContentType("text/plain;charset=utf-8");
            response.getWriter().write("导出功能尚未实现");
        } catch (Exception e) {
            throw new ServiceException("导出报表失败: " + e.getMessage());
        }
    }
} 